Naslov
Research of Lithophyllum algal rims in the central Adriatic – what have we learned so far

Autori
Bakran-Petricioli, Tatjana ; Faivre, Sanja ; Petricioli, Donat

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
3rd International Workshop "Research in Shallow Marine and Freshwater Systems" : abstracts ; u: Berichte aus dem MARUM und dem Fachbereich Geowissenschaften der Universität Bremen (2013) (292) / Pichler, T. ; Häusler, S. ; Tsounis, G. - Bremen : Universität Bremen, 2013, 23-23

Skup
International Workshop "Research in Shallow Marine and Freshwater Systems" (3 ; 2013)

Mjesto i datum
Bremen, Njemačka, 14.02.2013. - 15.02.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
sea-level indicators; Lithophyllum lichenoides; Adriatic Sea

Sažetak
Biogenic littoral rims built by the coralline rhodophyte Lithophyllum lichenoides can be found on particularly exposed sites on rocky coasts of the Central Adriatic islands in Croatia. The thick and well-developed Lithophyllum rim is considered to be a precise (±10 cm) sea-level indicator. Up to now we have studied five locations on which biogenic rims were mapped, measured and sampled for 14C dating. The researched algal structures have two dominant levels: the upper one, with a maximal extension up to 150 cm, and the lower one with a maximal extension of about 40 cm. The surface of the lower level is about 60 cm below the recent one. Today, living talli of Lithophyllum lichenoides were found only in small patches at the highest position of the rim and along its upper limit, what could clearly be connected to the recent acceleration of sea-level rise. Based on these biological indicators a new sea-level reconstruction was made which showed that large algal rims grew during near-stable sea-level conditions that occurred during two relatively colder periods in the past 1500 years. The presentation will focus on issues that we encountered during the field sampling and measurement of biogenic rims ; that is: measuring the position of the rim in relation to recent biological mean sea level (BMSL), the relation of the BMSL and the hydrographic MSL and the position of the sample according to the BMSL and hydrographic MSL. Our research emphasizes the importance of precise measurement during sampling accompanied by precise drawing and taking notes.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Geografija

POVEZANOST RADA